Valve-tension scale.



Patented Feb. 28, 1911.

Snuenfov lmilncmea pointed. out in. the claims.

CYRUS C. SHIGLEY, JTJE GRAND RAPIDS, MllZCHIGAN.

VALVE-TENSION SCALE.

Specification of Letters Patent.

Patented Feb. 28, 1911.

Application filed February 4, 1910. Serial No. 541,979.

valves, .such carburetor valves. used in explosion engines. p

The main objects of this invention are to provide an improved scale whereby valves can be readily tested to determine the tension thereon, without disassembling orremoving from the engine or other place of use, such as automobiles and like motor vehicles. Further, to provide an improved scale adapted for the uses stated, which is simple and economical in structure and very convenient to use. i

. Further objects, and objects relating to strl'lctural, details, will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification.

The structure described constitutes one effective embodiment of my invention. Other embodiments would be readily devised by those skilled in the art.

The invention is clearly defined and A structure constituting an effective and preferred embodin'ient of the features of my invention is clearly illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure 1 is a plan view of a structure embodying the features of my invention, the same being shown associated with a carburetor valve, to illustrate the manner of using the scale. Fig. 2 is a longitudinal section, taken on a line corresponding to .line 2-2 of Fig. 1, the scale rod being shown in full-lines. Fig. 8 is a detail section, taken on a line corresponding to line 33 of Fig. 1. Fig. 1 is a detail sect-ion, taken on a line corresponding to line l -1 of Figs. 1 and 2. ig. 5 is a plan view of the scale rod.

In the drawing, similar reference charac- I tore refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, I provide a casing 1, which is preferably cylindrical or barrel-lilte in form and of a size to be conveniently grasped so that it serves as a hand piece. This casing is slotted at 2, and provided with suitable scale indicia. 3, at one ed'e'e of the slot.

The scale bar or rod 1 is slidably ar ranged through the end piece 5 of the casing, which. is, in the structure illustrated, in the form of a plug, the hole (3 in the end piece being arranged at one side of the. c enter of the plug, as clearly appears in the drawing. v A support 7 is provided for the inner end of a red, the support having a hole 8 therethrough to receive the rod arranged in alinement with the hhle G in the end piece ()n the rod is an indicia finger t), which projects into the slot 2 in the casing to prevent turning of the scale rod, and also to bring the end ofthe finger into proper relation to the scale 'indicia. A tension s n'ing'ltl connected to the finger 9, and

to the end piece 5.

A stop 11 is provided for limiting the outward movement of the rod, the stop being arranged to engage the end piece. For holding thr rod in position to permit more convenient reading, I provide a clutch. This, in the structure illustrated, consists of a clutch member 12, which is slidably arranged in the support 7, to project through the casing in position to be engaged with the thumb. The scale rod is arranged through this clutch member 12, which coacts with the support in clutching the rod. lVhen pressure is applied to the men'iber 12, the rod is gripped between the members 7 and 12, but, when released, it slides freely therethrough.

The rod 4 is preferably provided with a forked ofiset foot 13, which is adapted to, engage the valves, as 15, 0f carburetors, as- 16, at a central point, the forked foot straddling the valve guiderod'lZ, which is, of course, centrally arranged. This rod is, in common construction of carburetors, threaded into the carburetor easing or body, and serves to adjust the tension spring 18. As is Well konwn, the carburetor valve embodied the Same, and which form I find to be'satisfactory. I am, however, aware that the structural features may be considerably modified, but, as it is believed these modifications will be obvious to those skilled in the art to which this invention relates,1 do not attempt to illustrate and describe the same herein.

I claim:

1. In a device of the class described, the

combination of a barrel-like casing, adapted to serve as a hand piece and having a slot therein and scale indicia associated therewith; a scale rod having an index finger thereon arranged in said slot; an end piece for said casing through which said rod is slidably arranged; a tension spring connected to said index finger and to said end piece; a support through which the inner end of said rod is slidably arranged; and a x clutch member. through which said scale rod is arranged, slidably arranged in said support to project from said barrel andcoaeting with said support to form a clutch for said rod.

2. In a device of the class described, the combination of a barrel-like casing, adapted to serve as a hand piece and having a slot therein and scale indicia associated therewith; a scale rod having an index finger thereon arranged in said slot; an end piece for said casing through which said rod is slidably arranged; a tension spring for said scale rod; a support through which the inner end ofsaid rod is slidably arranged; and a clutch member through which said scale rod is arranged, slidably arranged in said support to project from said barrel and coacting with said support to form a clutch for said rod.

3. In a device of the class described, the combination of a casing adapted to serve as a hand piece and having a slot therein and scale indicia associated therewith; a scale rod having an index finger thereon arranged in said slot, said index finger being adapted to support said scale rod against rotative movement, said scale rod having an off-set forked foot-at its outer end, said offset being in the direction of said index a tension spring for said scale rod connected to said index finger; a support through which the inner end of said rod is slidably arranged; and a clutch for said rod projecting from the said casing to form a finger piece. V

i. In a device of the class described, the combination of a casing adapted to serve as a hand piece and having a slot therein and scale indicia associated therewith; a scale rod having an index finger thereon arr ged in said slot, said index finger being a apted to support said scale rod against rotative movement, said scale rod having an ofi-set' forked toot at its outer end, said offset being in the direction of said index finger; a tension spring for said scale rod connected to said index finger; and a support through which the inner end of said rod is slidably arranged.

5. In a device of the class described, the combination of a body haying scale indiela associated therewith; a scale rod having an indicia index thereon; a support through which the inner end of said scale rod is slidably arranged; and a clutch member through which said scale rod is arranged, slidably associated with said support to pro]ect through saidbody and coact with said support to form a clutch-for saldrod.

In witness whereof, I have hereunto set my hand and seal in the presence of,two'

witnesses.

CYRUS o. SHIGL Y.

Witnesses:

J.- G, TURCK, PATRICK MCLAUG LIN. 

